# Posts by rohit

Total # Posts: 108

uni of huddersfield
An electron (m = 9 x 10-31 kg) leaves the cathode of a radio tube with zero initial velocity and travels in a straight line to the anode, which is 1 cm away. It reaches the anode with a velocity of 6 x 106 m s-1 i)calculate the acceleration and the force ? ii) the time taken ...

maths
5 geometric mean betweem 16 and 1/4

Math
Triangle ABC is a right angled at A. AD is perpendicular to BC,AB=5cm,BC=13cm andAC=12cm. Find the area of triangle ABC.also find the length of AD

Maths
In a parallelogram the base and height are in the ratio of 5:2 ,if the area of parallelogram is 360 find base and height

math
a circular pizza is cut along four diameters into eight identical sectors. If the total perimeter if each sector is 10 inches what is area of the whole pizza? express answer as a decimal to nearest tenth

chauhan
sinx/1 cosx sinx/1-cosx=4 ,x lies in 1st quadrant then value of x is

Chemistry
If 152 grams of ethane (C2H6) are reacted with 231 grams of oxygen gas, what is the excess reactant? 2C2H6 + 7O2(g) → 4CO2(g) + 6H2O(g)

physics
4N force applied on a body mass 20kg then calculate work done in 3sec?

phsics
24.5

maths
write numeral for thirty seven crore thirteen thousand nine hundred forty eight

science
Suggest an experiment to compare the conductivity of electricity by iron, copper, aluminium and zinc. Perform the experiment and prepare a short report on the resu

Math
2+3 =5

Math
A cylinder of curved surface area 1250m² is formed from a rectangular metallic sheet .Find the dimensions of the rectangular sheet I its length is double its breadth?

maths
Sorry I don't know

maths
Divide 54 into two parts such that one part is 2/7 find the other

chemistry
what increasing order of dipole moment among nitrobenzene methylbenzene phenol and toluene

Chemistry
Calculate the standard internal energy change for the formation of water at 298K. The standard enthalpy of formation of water at 298K is - 285.8 KJ/mol.

science
When the ray of light travels from air to glass slab and strikes the surface of separation at 90 degree , then it ..........

physics
When the ray of light travels from air to glass slab and strikes the surface of separation at 90 degree , then it ..........

math
The ratio of boys and girls in a class is 5:3 if 20 % of the boys and 60 % of girls have passed in first class what percentage of the class is in first class?

math
in a Quadrilateral ABCD, AB=AD and CB=CD. Prove that- (1) AC bisects angle BAD (2) AC is perpendicular bisector of BD

math
The sum of interior angels and the sum of exterior angles of polygon are in the ratio 9:2.find the sides of regular polygon.

Spga
if the angle of elevation of the sun is change from 45° to 60° then the length of shadow of the pole is deceased by 10 cm then height of the pole is

maths
Y=60

maths
Score of Janet in Maths is 25 more than two-third of her score in English. If she scores x marks in English, what is her score in Maths ?

maths
there are 20 apples and 15 oranges in a bin.if some apples are removed from the bin so that the probability of randomly drawing an apple becomes 2/5.how many apples must be removed from the bin

Physics
A turn of radius 20m is banked for the vehicle going at a speed of 36km/h. If the coefficient of static friction between the road and the tyres is 0.4, what are the possible speeds of a vehicke so that it neither slip down nor skids up?

math
draw a square on the graph paper whose each side of the length 5 centimetre and then make partition of the square into 25 small squares as soon in figure 1.1 each square is small square have its height and length 1 centimetre

math

general maths
7+9+15

math
Two trains are on the same track a distance 100 km apart heading towards one another, each at a speed of 50 km/h. A fly starting out at the front of one train, flies towards the other at a speed of 75 km/h. Upon reaching the other train, the fly turns around and continues ...

geometry
Two circles which are not congruent touch externally. the sum of their area is 130¦Ðcm.square and distance between their centers is 14 cm. find radii of circles.

geometry
triangle ABC have angle ABC 90 degree. therefore the triangle ABC is right angled triangle. Therefore, In triangle ABC, by phyathagoras theorem, AC ¡Á AC =AB¡ÁAB BC ¡ÁBC AC ¡Á AC = 5¡Á5 12¡Á12 = 25 ...

PHYSICS
hey have u got this@Anonymous

math
a+boundary+wall+of+your+house+is+divided+in+to+10+vertical+strips+of+equal+width+you+painted+4+strips+of+wall+with+pink+3+with+yellow+and+3+strips+with+green+paint+find+the+percentage+area+of+wall+painted+with+pink+colour

essay compition
the rights and responsibilits of citizens

Chemistry
A reference solution is to be prepared with 5 PPM parabenzopyrene (molecular weight = 252). The quantity of parabenzopyrene required for preparing one litre 5 PPM solution is (A) 252 mg (B) 25.2 mg (C) 5 mg (D) 252 g

math

as we have to chose positive odd integers sp we cant choose maximum big numbers close to 1 its choose w=3 x=3 then y=5 z=7 then answer is minimum is 1/45 or 1+45=46

pls heeelp math
answer is 6/11 or 11+6= 17

maths
Determine 208/207+208/207×206/205+208/207×206/205×204/203+…

maths
Find the smallest number N such that: The number of divisors of N is A. The number of divisors of A is B. The number of divisors of B is C. The number of divisors of C is 3.

maths
419.....go and get points

Geometry and combiantorics.
yes randy morico is correct

math
820

maths
How many functions f from the reals to the reals are there, such that f(f(x))=x^2−2? Details and assumptions f need not be a polynomial. f need not even be continuous.

maths
How many positive integers n are there such that 10^n≤n^10?

maths
What is the smallest positive integer with exactly 12 (positive) divisors?

algebra
can u explain how?

algebra
thx

physics
Earthquakes are motions of the earth's crust. Essentially, they are big sound waves that travel through the earth. There are two types of waves. The first type is called a longitudinal or P wave, where the earth compresses in the same direction as the wave travels. The ...

Physics
thank you

math
As θ ranges over all real values, what is the maximum value of (14sinθ+5cosθ)^2

maths
On children's day, a teacher brought 63 erasers and 147 sweets to distribute out completely to her class. Each student receives the same number of erasers as each other, and the same number of sweets as each other. What is the most number of students in the class? Details ...

maths
As x,y,z ranges over all possible real numbers, what is the minimum value of 3x^2+12y^2+27z^2−4xy−12yz−6xz−8y−24z+100?

maths
Find the number of positive integers <1000 that can be expressed as 2^k−2^m, where k and m are non-negative integers.

maths
What is the sum of all integer values of n such that 3n+15/(n−1)(n−5) is also an integer

maths
Suppose z=a+bi, where a and b are integers and i is the imaginary unit. We are given that |1+iz|=|1−iz| and |z−(13+15i)|<17. Find the largest possible value of a+b. Details and assumptions i is the imaginary unit, where i^2=−1.

physics
thankyou

physics
You and your friend, both of mass 70 kg, are playing catch with a frisbee on frictionless ice. Initially, you are both at rest. You throw a 0.175 kg frisbee at 10 m/s horizontally at your friend, who catches it. After they catch the frisbee, what is the relative velocity ...

maths
The probability that Katarina will correctly solve a given Brilliant math problem is 1/8. The probability that Layla will solve the same problem correctly is 1/12. The probability that they will give the same incorrect numerical result is 1/1001. Suppose Katarina and Layla ...

maths
Three coins are randomly placed into different positions on a 4×10 grid. The probability that no two coins are in the same row or column can be expressed as ab where a and b are coprime positive integers. What is the probability of a+b?

maths
x,y and z are positive reals. What is the maximum value of ((x+y+z)^3−x^3−y^3−z^3)^2/(x^2+y^2+z^2)^3−x^6−y^6−z^6

maths
Let f(x)=x^2−1. How many distinct real roots are there to f(f(f(x)))=0?

maths
What is the largest possible integer that can be chosen as one of five distinct positive integers whose average is 10? Details and assumptions The elements of a set are distinct, if no two of them are the same.

physics
A current I=1A flows along a thin-walled cylinder of radius R=4cm. What pressure in Pascals do the walls of the cylinder experience? Assume that the current is uniformly distributed. Bonus thing to think about: Is this pressure directed inwards or outwards?

physics
Two parallel wires carry 1-A currents in unknown directions. The distance between the wires is 10-cm. What is the magnitude of the magnetic field B in Teslas at a point P located 6-cm away from the axis of one of the wires and 8-cm away from the axis of the other wire? Unot=...

maths
ABC is an acute triangle with \angle BCA = 35 ^\circ. Denote the circumcenter of ABC as O and the orthocenter of ABC as H. If AO=AH, what is the value of \angle ABC (in degrees)?

physics
It should be 0.009

maths

maths
What is the smallest positive common difference of a 6-term arithmetic progression consisting entirely of (positive) prime numbers?

physics
The sun goes around the center of our galaxy once every 250 million years. The sun is also 2.55×10^20 m from the center of our galaxy. What is the acceleration of our sun towards the center of the galaxy in m/s^2?

calculus
A moving dot P departs from O at an initial speed of 6 m/s in the east direction and accelerates at 2 m/s^2 in the east direction. 2 seconds after P's departure, dot Q departs from O to chase down P at a constant speed of k m/s in the east direction. What is the minimum ...

calculus
What is the slope of the line tangent to the quadratic f(x)=4x^2−3x+6 at x=7?

maths
How many integers appear in both of the following arithmetic progressions: A1:2,9,16,……,2+(1000−1)×7 A2:3,12,…,21,…,3+(1000−1)×9 Details and assumptions Since 2 appears in A1 but not in A2, it does not appear in both of the ...

maths
Find the sum of all 3-digit positive numbers N that satisfy the condition that the digit sum of N is 3 times the digit sum of N+3. Details and assumptions The digit sum of a number is the sum of all its digits. For example, 1123 has a digit sum of 1+1+2+3=7. The number 12=012 ...

geometry help!!
thank you

maths-perimeter
A circular pond has 90 cm, wide footpath along its edge. A man walk around the outer edge of the footpath with 66 cm long steps. In 500 step, he makes a full round. What is the radius of the pond?

Dynamics
A car travels around a horizontal circular track of radius 45m.If the car increases its speed at a constant rate of 1.2m/s2 starting from rest, determine the time needed for it to reach an acceleration of 1.4m/s2. What is its speed at this instant?

math
underoot 2x square +3x + underoot 2 by alpha into beta method.

math
if x3+ax2-bx+10 is divisible by x2-3x+2 .find the value of a and b

Maths
Find the radius of a right circular cyilender whose volume is 3080cu.cm and height is 20cm.

physics
the two charges of magnitude 1rc and 2rc are separated by 10cm from each other at what point on the line joining the two charges is the electric field strength zero?

dav
determine the concentrated of mohrs salt solution with the help of supplied n/10 kmno4 solution preparred?

Maths
'a' and 'b'are integers and (a, b) = 2. Solve the following two equations: (a+b)^2 = 25a 18(a^4) + (b^4) = 41a(b^2) Can't get it, help please?

pre algebra
Let steve = x, therefore ramon = 3x x + 3x = 104 4x = 104 x = 26 Therefore steve earned \$26 Ramon = 3 * 26 = \$78

algebra
a) 7m + 36 = 11m -4m = -36 m = 9 b) 2x + 4 = 10x - 4 -8x = -8 x = 1 c) 11w - 8 = 22 - w 12w = 30 w = 5/2 d) 6a - 12 - a = 9a + 53 + a 5a - 12 = 10a + 53 -5a = 65 a = -13

Math
integrate (sin^8 x - cos^8 x)/(1 - 2sin^2 x * cos^2 x) w.r.t. x

Math
evaluate r. if12Pr=1320

Math
evaluate r. 12Pr=1320

grammar
D.R MAN MOHAN SING IS THE PRIME OF INDIA

algebra II
First, you know the formula is a^2 + b^2 = c^2. Next, substitute the values: a^2 + 1^2 = root 10 ^2 Do the operations. a^2 + 1 = 10 Now= a^2 = 10-1 a^2 = 9 a = 3

4 hundreds 3 tens 3 ones= 433 4 hundreds 3 tens 5 ones= 435 Count with me. 433, ..., 435 ANS: 434

computers
what computers can do?what computers cannot do?what are the advantages and disadvantages of computers?what are the roles of computer in the society?

scince maths
1- What volume of hydrogen gas at 273 K and 1 atm pressure will consumed in obtaining 2.16 gm of elemental born(atomic mass=10.8)from the reduction of born trichloride by hydrogen: A- 44.8 lit B-22.4 lit C- 89.6 lit D-67.2 lit

astronomy
The parallax of the red giant Betelguese is just barely measurable and has a value of about 0.005 arc seconds. What is its distance? Suppose the measurement is in error by + or -0.003 arc seconds. What limits can you set on its distance? 1/0.005 = 200 parsecs. Convert that to ...

astronomy
Arcturus is about half as hot as the Sun but is about 100 times more luminous. What is its radius campared to the sun. If Arcturus is half as hot, it radiates (1/2)^4 = 1/16 as much as the sun PER UNIT AREA. But since it radiates 100 times more totally, it must have 1600 times...

astronomy
The parallax of the red giant Betelguese is just barely measurable and has a value of about 0.005 arc seconds. What is its distance? Suppose the measurement is in error by + or -0.003 arc seconds. What limits can you set on its distance?

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